<template>
    <div>
     <!-- 用户列表组件  面包些导航 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/welcome' }">后台首页</el-breadcrumb-item>
        <el-breadcrumb-item >权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
     
      </el-breadcrumb>

      <!-- 卡片视图 -->
      <el-card>
          <el-row>
              <el-col>
                  <el-button type="success">添加角色  </el-button>
              </el-col>
          </el-row>
     
<!-- 角色列表区域 -->
<el-table :data="rolelist" border stripe>
    <!-- 展开列 -->
    <el-table-column type="expand">
        <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable  @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable  @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
</el-table-column>
<!-- 下面的是索引列 -->
<el-table-column type="index"></el-table-column>
<el-table-column label="角色名称" prop="roleName"></el-table-column>
<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
<el-table-column label="操作" width="360px">
    <template slot-scope="scope">
        <el-button type="primary" icon="el-icon-edit">
            编辑
        </el-button >
        <el-button type="danger" icon="el-icon-delete">
            删除
        </el-button >
        <el-button type="warning" icon="el-icon-search" @click="showSetRightDialog(scope.row)">
            分配权限
        </el-button >
    </template>
</el-table-column>
</el-table>
</el-card>

<!-- 分配权限的对话框 -->
<el-dialog title="分配权限" :visible.sync="setDRightialogVisible" width="50%" scope.row @close="setRightDialogClosed">
    <!-- 树形空间  :data="" 后面跟的要数据源  数据源仙胡就是rightslist-->
    <!-- 绑定的props看官方文档  
    show-checkbox 就是复选框
node-key="id"就是点击的id值
default-expand-all默认展开所有节点-->
    <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
    <span slot="footer" class="dialog-footer">
    <el-button @click="setDRightialogVisible = false">取 消</el-button>
    <el-button type="primary" @click=allotRights>确 定</el-button>
  </span>
</el-dialog>


</div>
</template>

<script>
    export default {

        data() {
            return {
                //所有角色列表数据
                rolelist: [],
                //控制分配权限对话框的显示与隐藏
                setDRightialogVisible: false,
                //所有权限的数据
                rightslist: [],
                //树形控件胡属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },

                //默认选中的节点id值数组
                //点击分配胡同时把所有拥有的三级权限id放进一个数组里  再把
                defKeys: [],
                //默认的授权id为空
                roleId: ''
            }
        },
        created() {
            this.getRolesList()
        },
        methods: {
            //获取所有角色的列表
            async getRolesList() {
                const {
                    data: res
                } = await this.$http.get('roles')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取角色列表失败')
                }
                this.rolelist = res.data
                console.log(this.rolelist)
            },

            //根据id删除对应的权限
            //弹框提示用户是否要删除
            async removeRightById(role, rightId) {
                const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)

                if (confirmResult !== 'confirm')
                    return this.$message.info('取消了删除')

                const {
                    data: res
                } = await this.$http.delete(
                    `roles/${role.id}/rights/${rightId}`
                )

                if (res.meta.status !== 200) {
                    return this.$message.error('删除权限失败！')
                }

                // this.getRolesList()
                role.children = res.data
            },

            //展示分配权限的对话框
            async showSetRightDialog(role) {

                this.roleId = role.id
                    //把这个布尔值改变之前应该获取所有权限的数据  用树形结构  为tree
                const {
                    data: res
                } = await this.$http.get('rights/tree')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取权限数据失败！')

                }
                //获取到的权限数据保存到data中
                this.rightslist = res.data
                console.log(this.rightslist);

                //递归获取三级权限节点胡id
                this.getLeafKeys(role, this.defKeys)
                this.setDRightialogVisible = true
            },
            //通过递归胡形式，获取角色下所有三级权限的id，(不包含children属性的就是三级节点)并保存到defkeys数组中
            getLeafKeys(node, arr) {
                if (!node.children) {
                    return arr.push(node.id)
                }
                node.children.forEach(item => this.getLeafKeys(item, arr))
            },
            //监听分配权限对话框的关闭事件
            setRightDialogClosed() {
                this.defKeys = []
            },
            //点击为角色分配权限
            async allotRights() {
                const keys = [
                        ...this.$refs.treeRef.getCheckedKeys(),
                        ...this.$refs.treeRef.getHalfCheckedNodes()
                    ]
                    // console.log(keys);
                    // 获取的id以逗号分隔好
                const idStr = keys.join(',')
                const {
                    data: res
                } = await this.$http.post(`roles/${this.roleId}/rights`, {
                    rids: idStr
                })
                if (res.meta.status !== 200) {
                    return this.$message.error('分配权限失败!')
                }
                this.$message.success('分配权限成功！')
                this.getRolesList()
                    //还药把整个对话框隐藏起来
                this.setDRightialogVisible = false
            }
        }

    }
</script>
<style lang="less" scoped>
    .el-tag {
        margin: 8px;
    }
    
    .bdtop {
        border-top: 1px solid #eee
    }
    
    .bdbottom {
        border-bottom: 1px solid #eee;
    }
    
    .vcenter {
        display: flex;
        align-items: center;
    }
    /*  */
</style>